Current Unstable Release (recommended)

SpeexDSP 1.2rc3

This brown-paper-bag release adds two headers that should
have been included with SpeexDSP 1.2rc2. These are needed
to build the resampler with NEON optimizations and to build
SpeexDSP without the Speex codec library.

Speex 1.2rc2 and SpeexDSP 1.2rc2

This release splits the speex codec library and the speex DSP library
into separate source trees. Both projects received build-system improvements,
bugfixes, and cleanup. The speex codec's VBR tuning was improved, while the
speexdsp resampler got some NEON optimizations.

1.2rc1

This release adds support for acoustic echo cancellation with multiple
microphones and multiple loudspeakers. It also adds an API to decorrelate
loudspeaker signals to improve multi-channel performance. In the bugfix
department, there are fixes for a few bugs in the echo canceller, jitter
buffer and preprocessor. At this point, the API for 1.2 should be stable
and only a few very minor additions are planned.

1.2beta3

The most obvious change in this release is that all the non-codec components (preprocessor,
echo cancellation, jitter buffer) have been moved to a new libspeexdsp library.
Other changes include a new jitter buffer algorithm and resampler improvements/fixes. This is also
the first release where libspeex can be built without any floating point support. To do this,
the float compatibility API must be disabled (--disable-float-api or DISABLE_FLOAT_API) and
the VBR feature must be disabled (--disable-vbr or DISABLE_VBR).

1.2beta2

Again, this new releases brings many improvements. The RAM requirement for
wideband has gone down drastically (i.e. more than 2x). A new resampler
module has been added, providing arbitrary sampling rate conversion -- fast.
The echo canceller has also been improved. A bug in 1.2beta1 that made the
echo canceller unstable has been fixed. The echo canceller should now
converge faster, be robust and tolerant of incorrect capture-playback
synchronisation. The preprocessor has also been greatly improved. Not only
should the quality be better, but it is now fully converted to fixed-point.
At last, early TriMedia support (incomplete) has been merged.